Speedmaster aluminum, and they didn't flow that well (in terms of a good head) but I'm used to it with eldebrocks lol. they did have a valve job and 2.05s and flowed mid 230's with untouched ports. With about 30 minutes of work the intake went to 254. Interesting thing is they were tested on two different benches in the exact same configuration. One showed 254 untouched and 270 with a little work and the other showed 233/254. I know which bench I'm going with.
